Plot hole: When Scully enters the game room after the game has shut off and the Lone Gunman are there but Mulder is missing. She is told that the only way in/out is from the door she came in. Later we find out that the bay that players use to enter the game is at the other end of the room and not conected to the door Scully used. So how did Mulder and Scully enter the game from the bay when the game was running?

Plot hole: The subject of the stakeout - the religious man dressed as a female prostitute to 'put the other prostitutes at ease' before trying to 'save' them - is shown when Scully is on the phone telling Mulder about it; the man has a very masculine face, a hairy stomach and is in no way convincing. It's extremely unlikely that such an obvious cross-dressed male would fool such a large amount of people.

I don't know if this is visible in all formats, but on the newest UK release on DVD, watching in widescreen, it's amazingly obvious. When Mulder recovers from the vampire attack, he gets up from the floor and breaks up a chair to make a stake. There is a shot of his feet as he smashes the legs off and bends to pick up a piece. In the bottom left hand corner of the screen, you can see a crew member's hand carefully and quickly placing a piece of wood on top of the pile for Mulder to pick up.